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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $54,749 | 2,181 | 2,890 |
| 2006 | $86,552 | 3,448 | 8,375 |
| 2007 | $133,366 | 6,372 | 12,056 |
| 2008 | $709,532 | 28,906 | 73,088 |
| 2009 | $732,961 | 23,775 | 73,210 |
| 2010 | $738,462 | 18,341 | 28,862 |
| 2011 | $592,844 | 18,239 | 28,402 |
Note: Quantity represents Number of pairs
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